Telephone system



Jam 2, Ii 923. EAWEUEES R. W AUGUSTINE.

TELEPHONE SYSTEM- FILED JULY 31. 1916. 2 SHEETS'SHEET 2 l'l ith this arrangement tluifirst operator to answer a call seizes it to the exclusion of? any subsequent operator, that is, when the first plug Al is connected to a callingline the sleeve relay AS associated therewith is connected to the sleeve strand and should a second operator attempt to seize this call, the highrosistancetest relay TE oil? the second cord circuit cannot operate, and this prevent's't-he second operator from connecting to this line. An answering tip siu ervisory relay AT is also associated ith-the answering end of thecord and is connected to the tip strand. The said relays Aid and AT control the answering supervisory signal AL. I also provide an instantaneous disconnect andrecall arrangement including a link disconnect Ll) so that should. a callingsul scriber desire to recall, as soon as his receiver has beenreplaced and prior to the cisconnection of the operato'rs cord C from his line, the replacing of his receiver energizes the link disconnect relaylJD thereby disconnecting' relays AT and AS so that the re moval of his receiver will again operate his line lamp S and the recall may be seized by the same or a different operator. y

Associated vith the calling end of the cord circuit C, I provide a calling sleeve relay CS anda calling tip supervisory relay 1T which are operated in a well-known manner, the two relays controlling'thecalling supervisory signal CL. Automatic party line ringing is also provided, and to this end 1 havefprovided a party line key BK together with ringing generators G, GP, G and G" and a ringing control relay RCB which is energized when a plunger the ringing key BK is actuated. 'An interrupter relay IR is also provided for alternately connecting ringing generator and the calling tip relay CT to the called line. A call register is" also provided comprisino a, meter relay MR and a meter magnet MM which are controlled through the common contacts of the ringing key'RK. Automatic listening and disconnect ofthc operators set 0 is also provided, the operators set being connected to the'eord conductors by the answering sleeve relay AS when connection is m adc to calling line and aga n disconnected bv the operation of the calling 51 eve rel- .15 when connection extendedto a called line For the purpose of describing my invention, it will he assumed/that the interrupter circuit 'A. is associated with a twelve posh t'ion switchboard equipped with cord. circuits as C, The interrupter A has tourinterrupter'leads, 1, 2, and 4 controlled by the operation of different connecting relays in the interrupter circuit, and are multiply connected to dili'erent positions of the switchboard preferably-as follows: The lead l is common to the cord circuits C of the first, third, fifth, seventh, ninth and eleventh positimis, and lead 2 is also commonto the first, tlurd, liitth, seventh, ninth and eleventh 'xositions. Lead 3 1s connnon'to the second,

"fourth, sixth,eighth, tenth and twelfth positions, and lead a to the second, fourth, etc, positlons.

the'load'. It is to be understood, however, that my invention is not hnnted to this exact 'inethod of grouping but that it is broader Jnscopo and the lnterrupter leads may be associated with the link circuits in any de- ,sirahle manner. V The interrupter circuit A is constantly operating but may be shut oil by the switch SlV in the battery. lead. l-pWillnoW describe one complete cycle of operation of the inter- ,rupter circuit A. Assuming that the apparatus isin normal position, as illustrated, a circuit for the relay 1, 1s established, when the switch Sl V 1s closed, traced i'rorn ground relay'b, traced ttroinground over the condoctor a, through Winding oi relay Z), alter nate contact 8 of relay a, and conductor 9 l distribute the leads as above descr bed to equalize and evenly distribute to the other side oil battery; The energization of the relay 7) establishes an energizing circuit for relay 0 traced from ground over conductor 5, through,ivinding' of'relay 0,

alternate contact 10 of relay 1), and conducv tor 9 to the other side of battery. The closing oi? alternate contact 11 of relay 0' connects errupter lead 1 in operative relation with the ringing apparatus of its assoeiated cord circuits. The closure of alternate contact cuit for relay d, traced from. ground over conductor 5, through Winding of relay (Z, alternate contact 12 of relay 0, andconductor 9 to the other side of battery. The energizatiou of relay (5 establishes an energizing circuit tor relay 0 traced from ground over conductor 5, through Windingot relay 6, alternate contact 13 of relay (Z, and conductor 9 to the other side ot battery. The energiza-- tion oi" relay cesizahlishesan energizing cucult [or relay traced trc ,qroundhver ciiinductor 5, i'zhrouph Wit oi 'relay f,

' i "nd over o hater The 7 c. V y 7' stahlishcs an ener grizing' circuit tor relay g "traced from ground, over coluluctor 5, through winding:

ol relay f], alternate contact l5 of relay 1, and over conductor 9' to the other side of battery. The ,enorgizatiou oi" relay g establishes an energizing circuit for relay latraced from; ground over condimtor 5, through winding of relay h, alternate contact 16 of relay 9 and conductor 9 to the other side of l'ishes' a circuit for relay traced from or relay 0 establishes a cirw battery. The energization of relay It estab- (5i "i? :s n energizing; 0 ground over fro m Winding of relay 2', and over side of bactexry. 4' estabhsh as m1 1 7 A w. i L Lu. T

1 I N mnunctnr 0, t

and G'VCI' centernate Contact 2% ground W of: relay; m and 0Y0]? son batter-w n} 1 estabhsnes rsiion and the 1am thereby dis- The closy 5,, upon its i 11 Ol relax hrough wi tact 2f? 01 01 1'01?" the other $151: 1- 9:) xclnys m n are e wrg med 1m Attic"; g and conductor 9 auccessively, but, 0'5: course. m

1. J18 in of a second. '72 brings 2.3mm tact 7 and the 0 inter upts t of mlcad 2 1e spew stomion slowly restoms to D01 0 toration storlng, open of its altern I mg the ener 1; ion of retoration of relay brill 105 of relay is connects the interrupter lead l with its associated cord circuits. llhe opening oi": alternate contact 20 of relay is upon its de-energization, brings about the deenergization of the relay Z and the opening of alternate contact 21 of relay Z brings about the de-energization of the relay m, and the opening oi: alternate contact 22 of relay m brings about the de-energization of the relay a. The relay a, upon restoring to normal, again closes its normal contact 7 to again bring about another cycle of operation of the interrupter it. The inter rupter lead 4t remains in operative relation with its associated cord circuits while relays 7a to a inclusive restore to normal and relays a to is inclusive again operate. Upon the operation of the relay in its normal con- .tact 30 is opened to disconnect the interrupter lead 4 from its associated cord circuits. The relays continue to perform the above cycle of operation and maintain an automatic sequential energization and deenergizationthereof at predetermined intervals. I

I will now describe the interrupter circuit A operating in connection with the cord circuit C which I will assume is one of the plurality of cord circuits of the first position with which the interrupter leads 1 and 2 are common. Assuming now that a call is v initiated at substation B by the removal oi? the receiver thereat, line relay LR is energized over the calling line effecting the operation of the line signals An operator upon noting the glowing ot' the signals inserts an answering plug AP into a jack J of the calling line thereby connecting relays TE and CG in series and causing the energization of TE but not that of ()0. Relay TE, upon energizing connects the sleeve relay AS to the sleeve conductor of the cord circuit C through alternate contact 10 of relay TE, causing the energizaticn of relay AS and CO in series followed by the energization of the tip relay All over ;he calling line. Relay AS upon energizing, closes its alternate'contact ll etfecting a locking circuit for itself through the sleeve conductor independent of the alternate contact 420. The closing of alternate contacts 42 and 4.8 of the relay AS connects the operators O in circuit with the cord circuit C through alter-v nate contacts is: and 1-5 of the calling sleeve relay CS.

Before proceeding further with the description of the connection, we will refer briefly to the arrangement tor excluding operators this same line. Assuming that a second opv erator inserts a plug Al? into another jack J of this calling line after theinsertion of the first plug, this second operators telephone will not be connected to this calling line due to the fact that the test relay TE who may subsequently connect to er the second cord will not become energized because of the circuit established through the comparatively low resistance relay AS of the cord. Therefore, the sleeve relay AS of the second cord does not energize and the second operator receiving no reply knows that the call has been seized.

Again takingup the first connection above referred to, the first operator to seize the call inquires the wants of the calling subscriber A and assuming that it is the substation D which is wanted, the operator of the cord circuit C tests a multiple jack of the called line D, as to its idle or busy condition. Should the line be busy the operator receives the customary busy click in her head receiver. Assuming that the line of the called substation D- is idle, the operator inserts the calling plug CP'into a multiple jack J of the wanted line, bringing about a series energizing circuit for the sleeve super visory relay GS and the cu t-oilrelay C0 of the line circuit L traced from battery through the winding of the relay CS, the sleeve contacts of the connected plug and jack, and through the winding of the relay CO to ground. The opening of normal contacts 4L4 and 4:5 disconnects the operators set Q from the cord circuit C.

A key KY is provided which is used when a subscriber on a party line is rung selectively by two rings. It a subscriber on the party line is rung selectively by one ring, the key KY is not actuated by the operator but remains normal as illustrated. Should the called subscriber on a party line he rung selectively by two rings, the key is moved to its alternate position for purposes as will be more fully described in another part of the specification. The operator now fully depresses the proper ringing plunger or the party line ringing key RK and as suming that it is the plunger 47 which is depressed, the end springs 4:8 and 49 i1nmediately assume their alternate positions, the spring 48 closing an energizing circuit for, the ringing control relay RCR, traced from battery through the winding of the said relay, conductor 50, alternate contact 48 of the end spring, conductor 51, normal contact. 52 of the relay Ll), conductor 53, and normal contact 54 of the calling tip supervisory relay CT to around at alter-- nate contact 55 of relay Cb. Although the circuit of the relay RC5; is interrupted at contact 48 when the operator removed pressure from the actuated plunger, the re lay RGltremains loc red up over a circuit extending from battery, through alternate contact 56 oi relay RCR, conductor 57, conductor 51, normal contact 52, conductor 53, and normal contact 54 of relay CT to ground at alternate contact 55 of relay GS.

Upon the energization of the relayRGR, the

said relay the alternate contact 59 of relay BUR; and the alternate Contact 77 of relay GRto ground. The operator noW actuates the hey KY to close its alternate contact 60 and assuming that the operator has 210ml ated the said hey lili at the beginning of a cycle. of operation, the interrupter lead 2 Will be connected and disconnected twice as I previously described n connection With the interrupter circuit A. The first energizing circuit for the relay lllt extends l re n.

groundthrough alternate contact 28 oi relay 0, the interrupter leadQ, the alternate contact 80 of relay will, conductor 81, al-' ternate contactfiO oi? key KY, alternate contact 58 of relay RUB, and through the interrupter relay lit to battery. The first period, of energization of the relay ill conill is brought about upon the GDQlglZtltlOIl of the relay 0 oi the interrupter circuitil when the relay 0 oi said interrupter circuit'A is restored to normal. interrupter relay ill is an'ain energ lead 62 to the called line, to operate the call bell of the called subscriber l) a second time. New should the operator depress the key after the interrupter lead 2 has been o eratively associated with the cord circuit C once, no actuation of the i terruptei" rela -i il Will be brouoht about "due to the y o 7 :tact that the interrupter lead. 2 is connected to the cord circuit C after the first relay a oi the series has de-energ'ized and therefore no energizing circuit for the relay oi: the

it is thus cord circuit C can be established. readily apprent that the code ring cannot be transmitted until the apparatus is in a position to transmit tull'code signal.

I have found by experiment that by tiniing the relays (i to 02 of interrupter circuit A. so that one, cycle of the operation occurs in about four and two-thirds seconds very satisfactory results canbe obtained] This places the lead 1 in operative relation with its associated cord circuits, during the e riod relays (Z to 'n are eno 'ized and relays a, Z) and c are (lG-Ql1l .ZlI1- due to the energization o't relay a which energization opens its normal contact 7. This places the interrupter lead 1 in operative relation with its associated cord circuits for a period oi? one second of time, and off for three and tii'o-thirc s seconds until a new cycle is again Well understood. The incompleted as is is placed in operative rela- Wl its sociated cord circuits for first neriod by the de-eiier isation of l c a it relay 0 which deenergization operates re- 0, the said relay 0 ren ainingenei'gized Led over the circuit previously traced to connect, the ringing taiiiing any lillli .tion of time.

intense While relays c and a are tie-energizing,

thus placing the lead 2 in operative relation for its'first period for two-thirds of a second of time. The de-energization oi": the relay 0 brings about the energization of relay 3) which places lead Bin operative relation with its associated cord circuits for the first period while relays f and g are ole-energized which places lead 3 in oper- I :1

I tive relation for first period of twothircs of a second of time. The de-eriergiza: tion of relay 9 again causes the operation oi relay 0 to placethe lead 2 in operative relation With its associated cord circuits for a. second period'ivliile relays 7i and z'are (lo-energized thus placing lead 2'in operative relation to its second period :t'or'twothirds of a second of time. The lead 2fWill thus be connected for two-thirds seconds for its irst periodand oil for two-thirds seconds While lead is connected for tivothirds "of asecond for its first period. The

lead 2 is again connected forttWo-thirds seconds while lead 3 is d sconnected for twothirds seconds of time. Thus interrupter lead 2 is disconnected 1501' two and twothirds seconds oi: time until another cycle of operation for said interrupter lead 2 is.

started. Upon the de-energization oirelay i. another operation of the relay p is brought about to place the lead 3 in operative relation With its associatedcoi'd circuits for its second period. While relays j and 70 are] ole-energized thus placing lead tl in operative relation. tor a second period of two thirds-oil a second. Ti lie-lead 3 will thus be connected for two-thirds seconds then dis connected for two-thirds seconds for its secondv period,- again connected for l3W0 'ijlTLlKlS"SGCODClS and then disconnected for two and tivo-thirds secondsof time, until another cycle tor the interrupter lead 3 is started. The de-energization of relay: 7c pla lead in operat ve relation with its associated cord circuits While relays l, m and.

n rest-cred and relays. a to Z'fagain operate during the next cycle thus placing the lead 4- in operative relation for about'one second ottiine and disconnecting it for about three and two-thirds seconds; 'FIOYQ the fore going; it is apparent that 1 hey arrange the pai'atus to transmit various codes coii l'le'lierriiig now to Fig. 2- i show a mechanical interrupter ai,'raii; eiiieiit operating substations and code ringing is used as is Well known in the art such as one ring, two

rings, one long and one'short ring. etc. My invention most particularly directed; to code ring if the exch 33.9 a plurality of desired ziron'ibination and. oil any I iio inst described and I provide keys l /l N,'

many key e Ke have the prom

is C0111 O11 GIN-1111C- are 119k; he

be c sand sha 5a "is In an "ah e11- 1 has mom tab} a Q A y a $111 1, 1 .L A

10m 17 ojecti ins,

plug and jack, and sleeve conductor of the cord circuit C to ground at alternate contact 133 of relay 10 1. *When the first projection 101 of the disk 100 disengages the spring 128,.said springs 128 and 129 assume their normal position interrupting the path of the ringing current. W hen the second projection engages spring 128, said contacts 128 and 129 are again closed to transmit an pulse or ringing current to the call bell of the called subscriber at substation D Thus the two long rings, which We have assumed. are the code ring oi the called substation D are transmitted to the substation D Just be fore the completion 01 one complete revolution of the shaft upon which the disks 100 and 103 are mounted, the projection 116 upon the disk 103 engages the spring 117 causing it to momentarily engage contact 118. This closes a circuit through left hand winding of relay 105, over a circuit traced from battery through the closed contacts 117, and 118 through left hand winding out said relay 105, alternate contact 135 of the relay 10-1, and conductor 114: to the other side of battery.

Since the relay 105 is differentially wound, the circuit through the left hand winding of relay 105 brings about its de-energization, and the opening of contact l2 1- of relay 105 opens the locking circuit of said relay 104, which relay restores to normal and interrupts alternate contacts 132, 133 bringing about disconnection of ringing current. Thus a particular code is rung once; then the ringing is automatically stopped. The operator to again ring the called substation D again depresses the key N to its fully depressed'position again momentarily closing the contacts 112 and 113 to bring about the operation 01'' the relay 105 to again complete a cycle of operation as just described.

' The disk 103 with its projection 116 acts as a guard against splitting up oi the different code rings. Assuming that the operator has depressed a key alter the projection 116 of disk 103 has passedthe springs 119 and 117, no energization of relay 10-1- is brought about as the cnergization of said relay is controlled by the contacts 119 and 120. The contacts 132 and 133 of relay 10dremain at normal and no ringing current is transmitted until the disk completed a rei 'olution, when the projection 116 engages the contact 119 and bring g's about the closing of contact 120 with that of 119 to energize relay 1041;. I

This automatic code ringing is non-interliering and automatic in its action so that a plurality of keys in different cord circuits may be depressed simultaneously without interfering with each other.

l fhile I have shown and described my invention in connection with certain forms of link circuits, it is apparent that my invention is of broader scope and may be used in said line. code ringing apparatus associated.

with said link circuit, a plurality oi switches controllable by a central oflice operator for connecting the said code ringing apparatusv to said telephone line to automatically code ring the substations thereon, and substation. controlled means for operatively disconnecting said code ringing apparatus from said telephone line. 1

2. A signalling system of the character described including a polystation telephone line, manual link circuit forconnection to said line, code ringing apparatus associated with said link circuit, a plurality of switches controllable by a central office operator for connecting the said code ringing apparatus 'd telephone line to automatically code the substations thereon. means for ing that any substation upon said line will receive its full code ring, and substation controlled means for operatively disconnecting said code ringing? apparatus from said telephone line. &

3. A telephone system including a calling and :1. called telephone line, a plurality of substations connected to said called telephone line, a link circuit provided. with a 'r of normally connected terminal plugs connecting said. lines in conversational circuit, code ringing apparatus associated i with said link circuit, and an operators key for connecting said ringing apparatus with said called telephone line to automatically code ring the desired. substation upon said line and for disconnecting one of said plugs from the other of said pair of plugs.

a. A telephone system including poly-station telephone lines, a plurality of connect ing links for interconnecting said telephone lines, code ringing apparatus common to said link circuits, switch keys for individually associatingthe dili'erent codes with the said link circuits, and means responsive to an operation of one of said keys to connect the desired code with a called one oi said lines to automatically code ring the substations thereon and for disconnecting said called line from ti associated connecting link.

5. In a telephone system, the combination withv a manual link circuit connected to a called telephone line,'o'li coco ringing apparatus for selectively signalling the substations upon said called line, operator controlled means for operatingsaid code ringing apparatus to selectively automatically signal the desired one of said substations, and menus controlled over said called telephone line for disassociating said code ringing apparatus from said cc. red line.

6. in a telephone system, the combination with a plug-ended link circuit C(filllQCtQtl to a poly-station telephone line, of code ringing apparatus associated with said link circuit, a plurality of switch keys for selecting the code to signal a desired substation noon said line, and means controlled by one o to connect the desired code at predetermined intervals to signal the desired substfi? upon said line and for disconnecting said link circuit i i-om said telephone line.

7. A telephone system including a polystation telephone line, a link circu. tor extending a call to said line, code ringing apparatus for selectively signalling the substations upon said line, a selective device controllable by a central ofiice operator for selecting the desired code, a relay contro lable by said selective device to associate the ((9 ringin apparatus withthe s; 'd line to automatically signal the desired substation thereon, and automatically controlled ieans :tor (ls-energizing said relay to disassociate said code ringing apparatus from said line.

8. A. telephone system comprising Sl1l scribers poly/station telephone lines, a pinrality of link circuits tor interconnecting said lines in conversational circuits, code ringing apparatus associated with said link circuits, operator controlled switches for selecting codes, a relay tor connecting the selected codes to called lines to automatically signal the desired substations thereon, said relay being controlled by said operators switches and subscriber controlled means for deenergizing said relay.

9. A signalling system of the character described, including a plug-ended link circuit connected to a poly-station telephone line, code ringing apparatus associated with said link circuit, an operator controlled device for connecting said code ringing apparatus to said telephone line, means for automaticallyoperating said signalling apparatus to insure that a full code ring'will be applied to signal the desired substation, and automatic means for operatively disconnecting said code ringing apparatus from said telephoneline.

10. A telephone system including a called subscribers line provided with a plurality of substations, a plurality of sources 0?? ringing current located at the central exchange, the number of substations connected to said line being a multiple of the number of sources of ringing current, and code ringing apparatus for connecting said sources of ringing current to said line to signal the desired substations thereon.

11. A. telephone system including a called subscribers line provided with a plurality of substr ions, a plurality'of sources of ringing current located at the central exchange, the number of substations connected to said line being a multiple of the number of sources of ringing current, code ringing mechanism, and operator controlled means for connecting said ringing current to said line via said ringing mechanism to signal desired substations upon said line,

12. A telephone system including a called subscribeus line provided with a plurality of substations, plurality of sources of ringing current located at the central ere change, the number of substations connected to said line being a multiple of the number (it sources of ringing current, an operators link circuit for extending a connection to said line, code ringing interrupter mecha nism, and operator controlled means for connecting said ringing current to said line via said code ringing mechanism.

13. A telephon system including a called subscribers line proyided with a plurality oil substations, a plurality of sources of ringing current located at the central exchange, the number of substations connected to said line being a multiple of the number of sources of ringing current, an operators link circuit for extending a connection to said line, code ringing interrupter mechanism, operator controlled means for connecting said. ringing current to said line via said code ringing mechanism, and automatic means for disconnecting said code ringing apparatus and said ringing current from said telephone line. v

14;. A telephone system including a calling subscribers line and a poly-station called subscribers line, an operators link circuit. for connecting said lines, code ringing apparatus associated with said link circuit, switchboard operator-control]ed means for connecting said code ringing apparatus to said called line and for insuring that a full code ring will be applied. to signal the desired substation upon said line, and automatic means for disconnecting said code ringing apparatus from said called line.

15. A telephone system including a calling and a called telephone line, a plurality of substations connected to said called telephone line, an operators link circuit for connecting said lines in conversational circuit, code ringing apparatus associated with said link circuit and common to a plurality of telephone lines, switchboard operator controlled means for connecting said code ringing apparatus with said called telephone line to automatically code ring the desired substation upon said line, and means for insuring that a full code ring will beapplied to said called line.

16. A. telephone system including a calling subscribers t "phone line and a callednals, and means I01 selectively causing said devices, each inde Jendently of the other, to modify the etlect oi the current from each source upon said signals.

2?. In a telephone system, the combination ol a signaling circuit including a plurality of tuned ringers, a plurality of sources of current for operating said ringers, each source adapted to produce a current of a certain frequency calculated to operate a plurality of said signals, apparatus to selectively connect each of said sources in said circuit, a plurality of commutators difierently arranged, and means to cause each of said coinrnuta'tors to interrupt the current in said circuit from. each of said sources.

28. In a telephone system, the combination of a signaling circuit, a plurality of signals in said circuit, a plurality of sources of signaling current each adapted to produce current of a character to which a plurality of said signals are responsive, mechanism to connect any of said sources of cur rent in. said circuit, a plurality of devices having differently arranged contacts, and means for causing either of said devices to interrupt the current in said circuit from either of said sources.

29. In a telephone system, the combination of a signaling circuit including a plurality of signals, a plurality of sources of current each adapted to produce current capable of operating a plurality of said signals, means for selecting and connecting said sources in said circuit, a plurality of devices each adapted to interrupt the current from said sources according to a predetermined code, and a single key mechanism for determining which of said devices should act upon the current in the ringing circuit.

30. lln a telephone system, the combination of a calling line and a called line, a signal on the called line, a cord circuit for connecting the lines together, an answering switch for connecting the cord to the calling line, a calling switch for connecting the cord to the called line, a ringing circuit including a portion of the cord circuit and the called line, a source of signal operating current adapted to be connected in said circuit, a relay controlling the connection of said source in said circuit, acircuit for said relay, a second relay controlling said circuit, and a circuit for the second relay controlled by the answering switch.

31. In a telephone system, the combination of a calling telephone line, substation apparatus thereon, a called telephone line, a signal on said line, a main station, link conductors at the main station for connecting the telephone lines together, a switching device for connecting the link conductors to the called line, a signaling generator at the main station, means to connectsaid generator to said signal, including said called telephone line, a. signaling key including key contacts controlling the connecting means and. mechanism, operable independently of said switching device and substation apparatus for relieving such key contacts from the control of said connecting means.

Signed by me at Chicago, county of Cook and State of Illinois, in the presence of two witnesses.

ROY W. AUGUSTINE. Witnesses:

G. A. YANOCHOWSKI, WM. BERGHAHN. 

